Retrieve an overwritten outlook express folder?

Ok, I was copying the outlook express store folder from and older machine to a new machine. The OE folder was stored on a network drive. From there i placed the store folder in a different location. Without thinking I opened OE to change the location of the folder on the new machine. Now our email server is set up to forward all emails to the client machine when they open their email client. So after i opened OE, it downloaded the newest emails, but since i changed the location of the folder after it downloaded them….it overwrote all the new ones. Is there anyway to retrieve those emails that were overwritten?